The CallThe Call The Call continues to stand as a classic, reflective work on life's purpose. Best selling author Os Guinness goes beyond our surface understanding of God's call and addresses the fact that God has a specific calling for our individual lives. Why am I here What is God's call in my life How do I fit God's call with my own individuality How should God's calling affect my career, my plans for the future, my concepts of success Guinness now helps